# SDR 99ZZZM121

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N191AT](https://openairdocs.org/aircraft/N191AT), registered now
- Make and model: Lkheed 10113851
- Aircraft serial: 193C1084
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 7339296
- Condition: Failed
- Location: Nr 1 Pack
- Stage of operation: CR
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZM121

## Discrepancy

DURING CRUISE A VERY STRONG ACRID ODOR WAS NOTED, ACCOMPANIED BY A BURNING SENSATION IN NOSE AND THROAT.  ODOR SEEMED STRONGEST AT CAPTAINS SIDE.  UNSCHEDULED LANDING.  FOUND NR 1 PACK TURBINE BYPASS VALVE STUCK IN THE OPEN POS.  REMVOED AND REPLACED BYPASS, RAN ENGINES AND CHECKED OK.  (M)

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